Combine your years: The 2026 guide to unlocking a Spanish pension for US expats

Thousands of Americans living in Spain could be missing out on state pension eligibility, as a little-known agreement allows workers to combine years paid into both systems to qualify for benefits. The arrangement, based on a bilateral agreement between Social Security Administration and Seguridad Social, is designed to protect workers who have split their careers between the United States and Spain. While it has existed for years, many expats remain unaware of how it works or whether they qualify.

Under the agreement, periods of work and contributions made in each country can be counted together to help meet minimum eligibility thresholds for pensions. This is particularly relevant for people who have not worked long enough in one country alone to qualify for benefits. This means that someone who has worked, for example, five years in Spain and five years in the United States may still be able to access pension payments, even if neither system would recognise them independently.

How the system works

Each country continues to pay its own portion of the pension, based only on the contributions made within its system. The combined years are used solely to determine eligibility, not to merge or transfer funds. Applications typically require coordination between both authorities, and claims can be initiated either in Spain or the United States depending on where the individual resides. Documentation proving employment history and contributions in both countries is essential, and processing times may vary.

Officials stress that this mechanism is not a loophole or bonus scheme, but rather a safeguard aimed at preventing workers from losing entitlements due to international mobility. Similar agreements exist between Spain and several other countries, reflecting increasingly global career paths.

Could expats in Spain be missing out on pension rights?

For many US expats living in Spain, the answer may be yes. Expats who have worked across borders, particularly those who moved mid-career or spent shorter periods in each country, are among the most likely to benefit. However, awareness remains low, and many assume they do not qualify simply because they have not met the minimum years in one system alone.

Financial advisers often warn that failing to explore these agreements can result in lost income during retirement. In some cases, individuals may be eligible for partial pensions from both countries, which together can provide a more stable financial base later in life.

The main factor is whether total combined years meet the required thresholds. In the United States, eligibility for retirement benefits typically requires a minimum number of credited work quarters, while Spain operates under its own contribution-based system.

What US expats should do now

Experts recommend that anyone who has worked in both countries review their contribution history well before reaching retirement age. This can involve requesting official records from both the US and Spanish systems, checking eligibility thresholds, and seeking guidance from pension specialists if needed. Early planning is particularly important, as gathering documentation across borders can take time.

For US expats already living in Spain, local Social Security offices can provide initial guidance, while US authorities offer support through their international services. As cross-border careers become more common, understanding how these agreements work could make a significant difference to long-term financial security.